stable supply

Hi albert

Why not go for Automatic Voltage Regulator ( AVR )

AVR is used to maintain the voltage level produced by the alternator i m asking for a solution atthe consumer level not at the production level

to control fluctuating voltage , following methods can be applied

1. servo voltage stabliser - according to capacity and input /output supply

2. capacitor bank at different levels

3. stepup/step down transformers.

mr. rivero if u can tell me more about servo voltage stabliser or give me a good link about its principle and functioning i tried but i could not get a good one

Well if your supply does not have enough capacity then of course the voltage will fluctuate heavily as you load it up. Could you give us an indication of how much current you are talking about? (There is a big difference between the loading of a manufacturing factory and a steel foundry) as well as if the factory is the cause of the large voltage fluctuations (due to its loads) or if the fluctuations are occurring on the power lines going to the factory (due to loads, etc on the power network).

Thanks.

Steel mills need very large motors that run their strip lines. These must all operate under careful speed controls as the strip get longer and runs faster as it is squeezed thinner. They have elaborate systems to keep the right tension and speed at all times. If the power is bad they must build an onsite power system to run their mill.

If they are just making bulk ingot steel the requirements are less, but you cannot have bessemer converters suddenly turned off or they will solidify and they might be hard to start again, so you still need a reliablke power source.

As aurizon pointed out:

<Steel mills need (use)very large motors that run their strip lines> maybe total 100 Megawatts! How much is yours?

So you need to induce the Supply Company to:

1. Supply you from a Larger MVA Transformer connected to a Higher Power BUS AND/ OR
2. INTRODUCE another Pumped Storage Genset into your supply Bus

AND/Or from Your side(assuming you are Rich/Powerful/Profitable):

• Install a peak-loading Gas Turbine Genset fuelled by the most Cost-effective Fuel to suit your load pattern. Make sure you have rapid load Control from 0 to120% in 1 minute or so.
• If you have Arc Furnaces in the Plant-you will surely need a large Synchronous Condenser Spinning--with the most rapid response to remove the Transients.

NOW CR4 is coming on to real world problems!

"AVR" is for homes-- for miniscule 1Kva loads. although Nishant may successfully argue "I meant generically".

I would be inclined to get in touch with your electricity supplier. If the line is old and the transformer/s are old, this will not help! Are your phases balanced? Are you drawing too much current for your lines and transformer? Where are the fluctuations occurring, at supply or inside the installation? Are you the only installation on the transformer? If not, maybe the other installations are affecting the line in an adverse manor by destabilizing the phases?

So many possibilities that I would start at the supplier, get them to check the line balance first!

Many plants use autotransformers to control problems with line fluctuations.

http://en.wikipedia.org/wiki/Autotransformer

Dang, I thought this thread was going to be about getting power to a horse barn...